Re: [pim] Replacing unicast BSMs with multicast

[Leonard Giuliano <lenny at juniper.net>]

On Wed, 26 Apr 2006, Stig Venaas wrote:

-) John Zwiebel wrote:
-) > 
-) > I would guess that in a service provider environment, the
-) > use of a static-RP is much preferred.  When you say anycast-RP
-) > 
-) > I'm also guessing that it probably an MSDP anycast system vs
-) > a PIM anycast.
-) > 

My comments apply to both.  

-) > Within an enterprise, I'll bet there is more auto-rp deployed than
-) > either static-RP or BSR (but that depends on that enterprise having
-) > cisco routers only of course).
-) 

I agree that AutoRP deployment on enterprises (especially financial) is 
pretty common, but that isn't due to vendor support.  Many vendors support 
AutoRP.  The main reason it is deployed is bc these networks were designed 
in 1996, and they don't want to change their design.

-) My impression would be static-RP for server provider and BSR/auto-rp more for
-) enterprises, but I haven't seen that many different ones.

Why?  Do enterprises prefer more complexity, slower convergence, more 
difficulty when troubleshooting?

My impression was that BSR was created to address the shortcomings of 
AutoRP, and then Anycast came along and everyone who deployed mcast 
since has been using that.  Seems like quite alot of work has been put 
into something for which there are much better alternatives.  Plus, with 
Anycast PIM, now you don't even need MSDP.



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